function FormState::has
Determines if an arbitrary property is present.
Parameters
string $property: Properties are often stored as multi-dimensional associative arrays. If $property is a string, it will return isset($storage[$property]). If $property is an array, each element of the array will be used as a nested key. If $property = ['foo', 'bar'] it will return isset($storage['foo']['bar']).
Overrides FormStateInterface::has
File
- 
              core/lib/ Drupal/ Core/ Form/ FormState.php, line 930 
Class
- FormState
- Stores information about the state of a form.
Namespace
Drupal\Core\FormCode
public function has($property) {
  $exists = NULL;
  NestedArray::getValue($this->storage, (array) $property, $exists);
  return $exists;
}Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.
